基于MMC的半波长交流输电潜供电流抑制措施研究
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摘要
半波长交流输电技术因其自身的特点在远距离输电场景中提供了一种解决方案,然而潜供电流的问题限制了半波长交流输电技术的发展和应用,现有的潜供电流抑制方案在半波长输电系统中应用时均存在不足。为了解决这一问题,总结了潜供电流的分布规律,在此基础上,提出了基于模块化多电平换流器(MMC)的潜供电流抑制措施,并进行了控制策略的设计以及参数的选取。此外,提出了分相投切无源元件来配合MMC工作从而减少MMC容量的方案。最后,在仿真平台对所提抑制措施进行了仿真验证,结果表明该措施可以有效地抑制半波长交流输电的潜供电流,加快熄弧速度,提高系统的故障恢复效率。
Half-wavelength AC transmission( HWACT) technique provides an alternative for remote transmission scenario due to its characteristics. However,the problem of secondary arc current limits the development and application of HWACT. The existing techniques have drawbacks when applied in HWACT system. In order to solve this problem,the distribution characteristics of secondary arc current in HWACT are analyzed,based on it the suppression technique using modular multi-level converter( MMC) is proposed. The control strategy and parameters of MMC are designed to compensate secondary arc current in HWACT system. Furthermore,a compensation scheme is proposed to reduce the capacity of MMC by switching passive components independently. Finally,simulations are carried out in PSCAD/EMTDC to verify the proposed method. The results show that the proposed technique can limit secondary arc current in HWACT system,and speed up the arc extinction and improve the fault recovery efficiency of the system.
Half-wavelength AC transmission( HWACT) technique provides an alternative for remote transmission scenario due to its characteristics. However,the problem of secondary arc current limits the development and application of HWACT. The existing techniques have drawbacks when applied in HWACT system. In order to solve this problem,the distribution characteristics of secondary arc current in HWACT are analyzed,based on it the suppression technique using modular multi-level converter( MMC) is proposed. The control strategy and parameters of MMC are designed to compensate secondary arc current in HWACT system. Furthermore,a compensation scheme is proposed to reduce the capacity of MMC by switching passive components independently. Finally,simulations are carried out in PSCAD/EMTDC to verify the proposed method. The results show that the proposed technique can limit secondary arc current in HWACT system,and speed up the arc extinction and improve the fault recovery efficiency of the system.
引文
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[16]徐政,肖晃庆,张哲任.模块化多电平换流器主回路参数设计[J].高电压技术,2015,(8):2514-2527.Xu Zheng,Xiao Huangqing,Zhang Zheren. Design of Main Circuit Parameters of Modular Multilevel Converters[J]. High Voltage Engineering,2015,(8):2514-2527.
[17]戴朝波,林海雪.电压源型逆变器三角载波电流控制新方法[J].中国电机工程学报,2002,(2):100-103.Dai Chaobo,Lin Haixue. A Novel Triangular Carrier Current Control for Voltage Source Inverters[J]. Proceedings of the CSEE,2002,(2):100-103.
[18]马惠,刘静芳,刘斌帅.改进的有源电力滤波器三角波脉宽调制电流控制方法[J].电力自动化设备,2004,(11):30-33.Ma Hui,Liu Jingfang,Liu Binshuai. Improved Triangle-wave Pulsewidth Modulation Current Control Method for Active Power Filter[J]. Electric Power Automation Equipment,2004,(11):30-33.
[19]贾红芳,高学军,程翔.一种改进的电流控制方法在有源电力滤波器中的应用[J].高压电器,2006,(1):70-72.Jia Hongfang,Gao Xuejun,Cheng Xiang. Application of an Improved Method of Current Tracking Contorl in AFP[J]. High Voltage Apparatus,2006,(1):70-72.
[20]屠卿瑞,徐政,管敏渊,等.模块化多电平换流器环流抑制控制器设计[J].电力系统自动化,2010,(18):57-61,83.Tu Qingrui,Xu Zheng,Guan Minyuan,et al. Design of Circulating Current Suppressing Controllers for Modular Multilevel Converter[J]. Automation of Electric Power Systems,2010,(18):57-61,83.
[21]徐政.柔性直流输电系统[M].机械工业出版社,2013:92-94.
[22]和彦淼,宋杲,曹荣江,等. 1 000 kV特高压输电线路潜供电弧试验研究[J].中国电机工程学报,2011,31(16):138-143.He Yanmiao,Song Gao,Cao Rongjiang,et al. Test research of secondary arc in 1 000 k V UHV double-circuit transmission lines[J]. Proceedings of the CSEE,2011,31(16):138-143.
[2]周浩,钟一俊.特高压交、直流输电的适用场合及其技术比较[J].电力自动化设备,2007,27(5):6-12.Zhou Hao, Zhong Yijun. Applicable occasions of UHVAC/UHVDC transmission and their technology comparisons in China[J]. Electric Power Automation Equipment,2007,27(5):6-12.
[3]张运洲,李晖.中国特高压电网的发展战略论述[J].中国电机工程学报,2009,29(22):1-7.Zhang Yunzhou,Li Hui. Analysis on the development strategies of the UHV grid in China[J]. Proceedings of the CSEE,2009,29(22):1-7.
[4]王冠,吕鑫昌,孙秋芹,等.半波长交流输电技术的研究现状与展望[J].电力系统自动化,2010,34(16):13-18,68.Wang Guan,LüXinchang,Sun Qiuqin,et al. Status quo and prospects of half-wavelength transmission technology[J]. Automation of Electric Power Systems,2010,34(16):13-18,68.
[5]郑健超.特高压半波长交流输电技术经济可行性初步研究总结报告[R].北京:中国电力科学研究院,2010.Zheng Jianchao. Summary Report of Preliminary Study on Technical and Economic Feasibility of the Half Wave-Length UHV-AC Transmission[R]. Beijing:CEPRI,2010.
[6] Parabhakara F S,Parthasarathy K,Ramachandra H N,et al. Performance of tuned half-wave-length power transmission lines[J]. IEEE trans on Power Apparatus and Systems,1969,88(12):1795-1802.
[7] Hubert F G,gent M R,half-wave-length power transmission lines[J].IEEE trans on Power Apparatus and Systems,1965,84(10):965-974.
[8] Jin X,Lu W,Lang P. A Measure to Limit Secondary Arc and TRVs in Yangcheng Project[C]. Transmission and Distribution Conference and Exhibition:Asia and Pacific,2005 IEEE/PES. IEEE Xplore,2005:1-4.
[9]郑健超.智能电力设备与半波长交流输电[J].中国电机工程学会动力与电气工程,2009,(10):12-15.
[10]宋云亭,周霄,李碧辉,等.特高压半波长交流输电系统经济性与可靠性评估[J].电网技术,2011,35(9):1-6.Song Yunting,Zhou Xiao,Li Bihui,et al. Economic Analysis and Reliability Assement of UHV Half-wavelength AC Tranimission[J]. Power System Technology,2011,35(9):1-6.
[11]孙秋芹,李庆民,吕鑫昌,等.半波长交流输电线路的潜供电弧特性与单相自动重合闸[J].电力系统自动化,2011,35(23):88-94.Sun Qiuqin,Li Qingmin,LüXinchang,et al. Secondary Arc Characteristics and Single-phase Auto-closure Scheme of Half-wavelength Transmission Lines[J]. Automation of Electric Power Systems,2011,35(23):88-94.
[12]韩彬,林集明,班连庚,等.特高压半波长交流输电系统电磁暂态特性分析[J].电网技术,2011,35(9):22-27.Han Bin,Lin Jiming,Ban Liangeng,et al. Analysis on Electromagnetic Transient Characteristics of UHV Half-wavelength AC Transmission System[J]. Power System Technology,2011,35(9):22-27.
[13]李振强,谷定燮,修木洪.特高压同塔双回线路潜供电弧抑制措施的比较[J].高电压技术,2010,36(10):2388-2392.Li Zhenqiang,Gu Dingxie,Xiu Muhong. Comparison of two measures on restricting secondary arc in UHV double circuit lines on the same tower[J]. High Voltage Engineering,2010,36(10):2388-2392.
[14]李振强,戴敏,娄颖,等.特高压线路地线布置方式对地线电能损耗及潜供电流的影响[J].电网技术,2010,34(2):24-28.Li zhenqiang,Dai Min,Lou Ying,et al. Effect of UHV ground wire disposition on its electric energy loss and secondary arc current[J].Power System Technology,2010,34(2):24-28.
[15]王晓彤,项祖涛,班连庚,等.重潮流下1000kV同塔双回长线路的潜供电流及其限制措施[J].电网技术,2013,37(11):3001-3006.Wang Xiaotong,Xiang Zutao,Ban Liangeng,et al. Secondary Arc Current in 1 000 k V Double-Circuit Long-Distance AC Transmission Lines on the Same Tower Under Heavy Power Flow and Its Restrictive Measures[J]. Power System Technology,2013,37(11):3001-3006.
[16]徐政,肖晃庆,张哲任.模块化多电平换流器主回路参数设计[J].高电压技术,2015,(8):2514-2527.Xu Zheng,Xiao Huangqing,Zhang Zheren. Design of Main Circuit Parameters of Modular Multilevel Converters[J]. High Voltage Engineering,2015,(8):2514-2527.
[17]戴朝波,林海雪.电压源型逆变器三角载波电流控制新方法[J].中国电机工程学报,2002,(2):100-103.Dai Chaobo,Lin Haixue. A Novel Triangular Carrier Current Control for Voltage Source Inverters[J]. Proceedings of the CSEE,2002,(2):100-103.
[18]马惠,刘静芳,刘斌帅.改进的有源电力滤波器三角波脉宽调制电流控制方法[J].电力自动化设备,2004,(11):30-33.Ma Hui,Liu Jingfang,Liu Binshuai. Improved Triangle-wave Pulsewidth Modulation Current Control Method for Active Power Filter[J]. Electric Power Automation Equipment,2004,(11):30-33.
[19]贾红芳,高学军,程翔.一种改进的电流控制方法在有源电力滤波器中的应用[J].高压电器,2006,(1):70-72.Jia Hongfang,Gao Xuejun,Cheng Xiang. Application of an Improved Method of Current Tracking Contorl in AFP[J]. High Voltage Apparatus,2006,(1):70-72.
[20]屠卿瑞,徐政,管敏渊,等.模块化多电平换流器环流抑制控制器设计[J].电力系统自动化,2010,(18):57-61,83.Tu Qingrui,Xu Zheng,Guan Minyuan,et al. Design of Circulating Current Suppressing Controllers for Modular Multilevel Converter[J]. Automation of Electric Power Systems,2010,(18):57-61,83.
[21]徐政.柔性直流输电系统[M].机械工业出版社,2013:92-94.
[22]和彦淼,宋杲,曹荣江,等. 1 000 kV特高压输电线路潜供电弧试验研究[J].中国电机工程学报,2011,31(16):138-143.He Yanmiao,Song Gao,Cao Rongjiang,et al. Test research of secondary arc in 1 000 k V UHV double-circuit transmission lines[J]. Proceedings of the CSEE,2011,31(16):138-143.